Hydraulic press for continuously-fed pasty or loose material.



J. JAGOBSEN.

HYDRAULIC PRESS FOR GONTINUOUSLY FED PASTY 0R LOOSE MATERIAL.

APPLIUATION FILED MAB.23,1909.

Patented 861313.23, 1918.

6 SHEETS-SHEET 1.

COLUMBIA PLANOGHAPH co.. wAsNlNaTN, D. c.

J. JAGOBSEN.

HYDRAULIC PRESS FOB. CONTINUOUSLY FED PASTY 0R LOOSE MATERIAL.

APPLICATION FILED Mums, 1909.

5 BHEETB-SHBET 2.

cnLUMBu) PLANOGRAPM cu.. WASHINGTON. D. c.

J. JACOBSEN.

HYDRAULIC PRESS POB. GONTINUOUSLY PED PASTY 0R LOOSE MATERIAL.

APPLIUATION FILED MAB. as, 1909.

1,073,856. Patented Sept. 23, 1913.

5 SHEETS-SHEET 3.

,NJ TD J. JACOBSEN.

HYDRAULIC PRESS POR CONTINUOUSLY FED PASTY 0R LOOSE MATERIAL.

PPLIOATION Hmm Mums, 1909.

1,073,856. Patented sept.23,1913.

.6 SHEETS-SHEET 4.

E1 CCZI CDLUMBIA PLANOORAPM to.. WAS NNNNNNNNNNN C.

J. JAGUBSEN.

HYDRAULIC PRESS FOR GoNTINUoUsLY FED PASTY on Loose MATERIAL.

1 APPLICATION FILED MAB..23, 1909.

Patented Sept. 23, 1913.

JOHANNES JACOBSEN, OF FRIEDENAU, NEAR BERLIN, GERMANY.

HYDRAULIC PRESS FOR CONTINUOUSLY-FED PASTY OR LOOSE MATERIAL.

Specification of Letters Patent.

Patented Sept. 23, 1913.

Application filed March 23, 1909. Serial No. 485,335.

To all whom t may concern.'

Be it known that I, JOHANNES JACOB- snN, engineer, a subject of the German Emperor, residing at 33/34 Cranachstrasse, Friedenau, near Berlin, Germany, have invented certain new and useful Improvements in Hydraulic Presses for Continuously-F ed Pasty or Loose Material; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the artto which it appertains to make and use the same.

The invention relates to a hydraulic press for continuously fed pasty or loose material, in which the material is fed into a feed box and moved into the working position independently of the pressram, said box being removed after the pressing stro-ke has been given, so as to leave the finished piece free to be ejected.

According to the present invention, the above mentioned box is connected to a subsidiary pressram in such a manner that it is moved into working position before the main ram begins its stroke and returns to its initial position before the main ram begins its back stroke.

The invention further relates to an appliance for reversing the action of the press. Appliances for automatically reversing the action of a hydraulic press by diverting the liquid to the rear of the ram, are known. In the known presses the reversing slide valve is however held in position by frietion only, and is opened by the liquid as soon as the pressure rises above a certain point. It will be easily understood that such a device can not possibly work with exactitude, in the first place because of the diiliculty of exactly establishing the necessary amount of friction, and secondly because the friction is gradually diminished by the working of the machine.

According to the present invention, the force necessary to automatically reverse the action of the press, is determined with great exactitude by providing stops to secure the slide valve in its extreme positions, said stops being released by members actuated by a determined force (weights or springs) which is overcome by the rising pressure of the liquid. The valve slide is then carried over to its other extreme position, and thereby opened.

In the accompanying drawings several embodiments of my invention are illustrated.

Figure l is a longitudinal section through a press according to the invention, showing the connecting conduits diagrammatically. Fig. 2 is a detail in cross section, showing the box in which the material is deposited and pressed. Fig. 3 is a detail section on line 3 3 of Fig. 2. Fig. 4 is a side elevation of a reversing device, partly in section, and showing the slide valve stopped by joint levers, which are doubled up by weighted members adapted to be lifted by the rising pressure. Fig. 5 is a horizontal section through the same embodiment of my inventio-n showing the reversing mechanism. Fig. (3 is a detail showing the weighted inember by which the stop is released. Fig. 7 is a side view of another embodiment of my invention in which the slide valve is stopped by wedges.

In a hydraulic cylinder 1, a piston 2 is adapted to slide, which carries on each end a ram 3. Opposite the ram 3 subsidiary rams 4 fitted on small pistons 5 are provided to throw out the finished pieces. The pistons 5 also move in separate hydraulic cylinders. The cylinder 1 is connected to the apparatus supplying the liquid to the press by the sockets (3 and 7. The connection is reversible, so that the socket 7 may communicate with the drain pipe, while the socket (l is connected to the pressure pipe and vice versa. Each ram is surrounded by a box 8 funnel shaped at the top and connected at the bottom to a small piston 9, both ends of which move in small hydraulic cylinders 10. (.)ne of these cylinders is always in connection with the pressure pipe and the other with the drain pipe. It is preferable to have the machine as a whole offset from the vertical, as indicated in Fig. 2, the structure presenting a considerable angle to a vertical plane.

In the position of the press rains and boxes shown in Fig. l, the socket 7 is assumed to be in communication with the delivery pipe, and the socket (i with the drain pipe. Gn the right hand side of the ligure the parts are shown in the position they occupy just before the' pressing stroke is finished, whereas on vthe 'left hand side the stroke has not yet I The left hand cylinder 10r is con-Y nected to the right hand cylinder 1 by a? begun.

conduit shown diagrammatically by the dot Y and dash lin-es in the drawing, Ithe lefthand i cylinder containing the piston 5 with the righthand cylinder 1 fan-d in the same the right hand cylinder 1,0 with lthe lefthand cylinder 1, and the'righthand cylinder containing the piston 5 with the lefthand cylin7 der 1f. `When therefore the connection of the sockets `6 and 7 with the ypressure pump is reversed, which may be done in any known manner, the action -of 4the vparts will be as follows: The left hand cylinder 10 is connected tothe drain pipe and the right hand cylinder l() with the delivery pipe.

rLlhe left hand 'box is thereby carried'to the left into 'the gap vbetween the "ram 3 and the l ejector 4, and leaves the column of material 11, which vtill then rested on a plate 12 .at j the upper end of the box '8, free to 'be fed Y At the same time Athe box`8 y releases an arm 13, which engages the box 8 by means of an adjustable screw 14. rlfhe into the box.

arm 13 follows the moving box under the influence iof a springl 15,y till a flap 17 connected with the arm and hinged lonto the lower end of the conduit feeding the ma- Y terial engages the material to prevent it rom` being fed downward into the box. This condition of V'things 'is shown o-n the righthand side of Fig. V1. In the meantime a wire 19 (Fig-2) Lstretched out between two arms 18 `attachedfto -the 4box 8, has cut' off the bottom .part of 4the `column of material 11, so that `it falls down into the boxhS. The piston 2 is now carried over to the left., and the lefthand ram 3 pressed against the material in the box, whichisheld between Y ders 1 and 10 the piston in the latter cylinder will ybe forced tothe V.other end of its stroke before the pistonv 2 has been moved through the lentire length offits cylinder.v

This is due to the, fact that the resistance offered by the feed box which is secured'directly to the piston 9 lis smaller than `that offered by .the pistons 2. When the fluid is admitted to both lcylinders simultaneously, the feed box will be moved toits other eX- treme position rapidly and without offen.v "ing much resist-ance whereas the piston 2 will travel more slowly due tothe resistance by its immediate parts." The same is true when bothofsaidfcyl'inders are connected -t-o the drain pipe and the piston 9 will re-V turn the feed box to its original position Vfast-er than the piston 2fwi'll` return Ato its loriginal position. In short asv the piston 9z lis more sensitiveto the motive fluid due to the small resistance offered by its immediate rparts, Vit will always operate slightly in ad Vance of the heavier and larger proportioned parts actuated by the pistons 2.

l/Vhen the press" is again reversed, the series of movements just described is repeated o-nthe Yrighthanrl sidefof the press. @n the righthand side, the finishedjpieoe has been ejected during the forward or pressing, fit the same jt1me that stroke on Jthe left. 'the lefthand 'box is moved under the column of material, the right hand box moves from under it, 'meets the movable arm 13 and Yby compressing 'the spring 15, releases the col-V 'umn ofmaterial held by the flap 17. VThe* i column falls downward onto 'the plate 12,

r`as is shown in Fig. 1 on Vthe lefthand side.l

At the same time the right hand box 8 has 'released ra hinged chute 22 controlled by a receives 'a slight .push from 'the chute 122,

which is thrown forv'vardby its spring 21, so that 'the piece is disengaged from the ector 4 and slides down lfrom the chute.

In case loose materialris to `be treated in the press, the appliance 1;(18, 19,) for cutting through the :column of material may of course lbe omitted, and other means must ibefemployed in vplace of the flap 17 tofeed' Va lde'te'rmined quantity fof material into the boxes .8, for instance va slide.

in the embodiment of Ithe reversing gear accord-ing "to my inventionV illustrated in Figs. 4 to '6, the valve slide a is provided on each side of the socket b with collars c, o

'of large diameter, and collars ci, d" of ysmaller diameter.

`1n the borings e, e and f, f in the chamber These collars fit tightly of the reversing gear. Between the borings e, e on the rone hand, and f, f on the other hand, the wall ofthe valve-chamber is fitted with grooves g, g', which make connection with 'the sockets it, it" Vleading to the hy drau'lic press. i

Both ends of the slide valve c are attached to the outer .ends of toggleljevers z', Qthe inner ends of which are pivoted to the valve chamber at 7c, 7c. The joints Z, Z* ofthe toggle levers are pivoted on journals m, m lcarried on loops ma", surrounding the ends of the valve chamber, (Fig. 6). lThe loops n.

n are attached to levers o, o', pivoted on the valve chamber in any suitable manner. Both levers engage small pistons p, 71 adapted to slide in cylinders q, (1. The cylinders (l, q communicate with the 1grooves g, f/ in the wall of the valve cham- The action of the parts described is as follows: In Figs. 4: and 5 the feeding conduit b communicates with the socket L, which makes connection with one side of the piston of the hydraulic press. The opposite side of the piston communicates by means of the socket h and the borings r/ and f with the drain pipe. The collar d of the slide valve is positioned in the boring f', and thereby separates the feeding conduit from the right hand drain of the valve chamber. The collar c registers with the boring e. The right hand toggle lever e" is stretched out and is kept in this position by the weights r attached to the loop n. The toggle lever z' is therefore naturally in its doubled up position.

The pressure of the liquid fed into the reversing gear acts on the slide valve in two opposite directions, that is leftward on the collar c and rightward on the collar cl. As the area of the collar c is larger than that of (Z the pressure tends to displace the slide valve from the position shown into its other extreme position. The valve is however prevented from executing this movement by the toggle lever z', el', which is stretched out to its full length.

When the pressure rises in the hydraulic press, it also rises in the parts of the slide valve chamber which are in communication with the press. Accordingly the pressure acts on the small cylinder q and lifts the lever loop n together with the weights attached to it when the pressure has attained a certain height. The loop n moves upward and doubles up the lever z" by means of its journals Z. The slide valve can now follow the pressure acting on the larger area vof the collar c, and accordingly moves into its opposite extreme position. The toggle lever z' is thereby straightened and the lever 0 engages the piston 7). The movement of the slide valve has opened the communication between the feed conduit b and the socket z, and the socket t communicates with the righthand drain of the valve chamber. The pressure in the small cylinder' (1 is thereby relieved and the piston 19 is lowered. rllhe lever o however remains in its raised position together with a loop n', because the straightened knee lever z' prevents the slide valve from moving to the right,

and the knee lever z" from straightening under the influence of the weights.

The loops n and n are provided with cushions .sand s', to break the impact 0f their fall onto the slide valve chamber.

In the embodiment of my invention illustratcd in Fig. 7 the slide valve is stopped by wedges t, and t', moving in wedge shaped grooves u, u of the valve chamber. The interior parts of the reversing gear are the same as those shown in F ig. 5.

The pressure of the hydraulic press which is to actuate the automatic reversing gear may be controlled by varying the weights r, r. In place of the weights springs may also be employed, the tension of which is controlled in a known manner.

Claimsl. Hydraulic press for continuously fed pasty or vloose material, fitted with a box into which the material to be pressed is fed, characterized in that the main ram passes transversely through an opening in the movable feed box and performs the working stroke against a gradually receding subsidiary ram, which during the back stroke of the main ram advances in its turn and ejects the finished piece.

2. Hydraulic press for continuously fed pasty or loose material, characterized by a movable feed box actuated by a subsidiary hydraulic piston, a spring controlled chute carrying a projection adapted to be pressed aside by the said box, as it is moved into working position, and released as it goes back to its initial position, so that the finished piece receives a slight blow from a projection on the chute and is disengaged from the ejector ram.

3. A hydraulic press for continuously fed pasty or loose material provided with a feed box into which the material to be pressed is fed, a subsidiary hydraulic piston to actuate said feed box, a main ram adapted to pass transverselythrough an opening in the movable feed box, a subsidiary ram which gradually rccedes during the working stroke of the main ram and advances in its turn during the back stroke of the main am to eject the finished piece of material, and a reversing valve to control the supply of fluid to said subsidiary piston and to said main and subsidiary rams.

In testimony whereof I have atlixed my signature, in presence of two witnesses.

JOHANNES JACOBSEN.

Vitnesses HENRY l'lAsrnn, lVoLnmmn llAUr'r.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

